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FlowconSupportTroubleshooting. HW_InpRly

Symptom - no input:

Input relay: LED on with 0VAC at screw

FIX - Replace bad input relay.


Input relay: LED off with 0V AC at screw

FIX - no input signal from external device: have an electrician trace the fault and repair it.


Symptom - input active

Input relay: LED off with 120V AC at screw

Probable Cause (in most likely order)

Replace bad input relay.

No 5V AC at relay rack:
Check fuse on power supply. If bad, find fault and replace fuse.

Disconnect and reapply power to the power supply.
If output voltage is still low, disconnect power wires at relay rack.
If still low, power supply is probably bad - replace it.